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Homework #5
•Question 1   (1 point) The key difference between atoms of two different chemical elements is their number of
 a.Electrons   b.Protons   c.Neutrons   
•Question 2   (1 point) The neutral atom of the most common form of hydrogen consists of
•a.one proton and one neutron.  
•b.one proton.  
•c.one proton, one neutron, and one electron.  
•d.one proton and one electron.  
•e.an isotope and an ion.   
• Question 3   (1 point) Two neutral atoms of the same element but of different isotopes contain the same number of
•a. Electrons, Protons, and Neutrons  
•b. Electrons and Protons but not Neutrons  
•c. Electrons and Neutrons but not Protons  
•d. Neutrons and Protons but not Electrons